call with AKo early facing all in push?

[brenno11]

this was in a home game last night. Villian got caught bluffing the hand before and has around 1000 in chips. He has been agressive. In the actual hand the blinds were 20/40 and starting stacks were 1500. Under the gun folds and villian pushes all in. I hold AKo and have around 1300 in chips. Is this an automatic call because I thought I may have had him easily dominated with Ax or should I pass this up in case its a gamble against an pocket pair so early on in the game?